Web tensioning means



March 27, 1934.

G. C. COIL WEB TENSIONING MEANS Filed Dec. 7, 1931 INVENTOR Gwvez C.Coil Patented Mar. 27, 1934 WEB TENSIONING MEANS Grover C. Coil, Dayton,

Ohio, assignor to Ohmer Fare Register Company, Dayton, Ohio ApplicationDecember 7, 1931, Serial No. 579,487

10 Claims.

The object of this invention is to provide a braking mechanism for aroll of paper and means co-acting with the braking mechanism toresiliently hold the paper web under tension. As

shown the invention is used in connection with a cash register ofconventional make but it should be understood that it is so shown by wayof illustration only and it may be applied to any roll of paper fromwhich a web is unwound.

Referring more particularly to the drawing,

Figure 1 Ba side elevational view of a cash register mounted on a boxcontaining the paper rolls and from which the paper web passes to thecash register, and

Figure 2 is a perspective view of the brake an paper tensioning means.

A cash register 1 is mounted on a box or container 2 in which paperrolls 3 and 4 are mounted on spindles 5 and 6 respectively. The webs 7and 8 extend from the paper rolls through slots 9 and 10 respectively inthe top of the box 2 to an oscillating printing carrier '11 and thenceto feed rollers 12 and 13 respectively, which feed rollers are rotatedby a conventional means to draw the paper webs from the rolls.

A shaft 14 is secured to the side wall 15 of the box and has a dependingarm 16 rotatably mounted thereon and carrying a brake 1'7 which may beof rubber or other suitable material. This arm 16 is provided with aslot 18 which receives a pin 19 carried by an arm 20 which is providedwith a guide bar 21 at its forward end and with a tail 22'at its rearend, which tail 22 is attached to a spring 23 which urges the arm 20 andthe parts thereof to the right of the shaft 14 downwardly. The paperweb, after leaving the roll 3, passes over the shaft 14 and beneath thebar 21 and thence through the slot 9 as heretofore described. A similarbrake and tensiom'ng mechanism is applied to the roll 4 and shows thesame parts except that they are modified to accommodate a roll 4 whichrotates in an opposite direction from the roll 3. As a matter of fact,each of the parts is identical except that the mechanism faces anopposite direction. The shaft 14 and the bar 21 are provided withenlarged ends 24 and 25 which act as a means to prevent the paper webfrom sliding off the ends thereof.

In operation the feed rolls 12 and 13 draw the paper from the rolls 3and 4. During the first part of the time that the paper is so drawn, thearm 20 will be raised which elevates the pin 19 to the upper end of theslot 18 and rotates the arm 16 so as to disengage the brake from theperiphery of a metal disk 26 carried by the spindle 5.

The paper from the roll 3 is now fed forward, rotating the feed roll.This relieves the tension on the paper web 7 and the spring 23 aidsgravity in pulling the arm 20' downwardly thereby again placing thepaper under. tension. If the paper is fed very far the arm 20 willoscillate up and down and each time it moves up it releases the brakeandthe moment the brake is released, the arm 20 falls, so that the paperis at all times. held under tension.

I realizethat many changes may be made in the specific form of thisinvention shown and described by way of illustration in this applicationand I, therefore, reserve the right to make such changes in thespeciiicform of the invention as shown herein as I may find to bedesirable. I, therefore, claim the invention broadly except as I maylimit myself by the appended claims.

Having now described my invention, I claim:

1. In combination with a roll of paper mounted forunwinding movement anda feeding mechanism to draw a web of paper from said roll and to causethe unwinding movement, a shaft around which said web is trained, an armmounted on said shaft and having a braking surface and adapted to resistnormally the unwinding movement of said roll, andmeans including a pinand slot connection to intermittently release said brake.

2. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a shaft around which said web is trained,an arm mounted on said shaft and having a braking surface adapted toresist normally the unwinding movement of said roll, means including apin and slot connection to intermittently release said brake, and meanswhereby said means is controlled by said web.

3. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a shaft around which said web is trained,an arm mounted on said shaft and having a braking surface adapted toresist normally the unwinding movement of said roll, a lever tointermittently release said brake, and means whereby said lever iscontrolled by said web.

4. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a shaft around which said web is trained,an arm mounted on said shaft, a brake attached to said arm and adaptedto resist normally the unwinding movement of said roll, a lever, a pinand slot connection between said lever and said arm whereby when saidlever is elevated the brake will be released and when said lever islowered the brake will be operative, and means whereby said lever iscontrolled by said web.

5. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a shaft around which said web is trained,an arm mounted on said shaft, a brake attached to said arm and adaptedto resist normally the unwinding movement of said roll, a lever, a pinand slot connection between said lever and said arm whereby when saidlever is elevated the bralre will be released and when said lever islowered the brake will be operative, means whereby said lever iscontrolled by said web, and spring means to constantly urge said leverin a direction so as to cause the brake to be operative.

6. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a shaft around which said web is trained,an arm mounted on said shaft, a brake attached to said arm and adaptedto resist normally the unwinding movement of said roll, a leverrotatably mounted on said shaft, a pin and slot connection between thelever and the arm, and a bar carried by the lever and so spaced from theshaft that the web may be trained over said shaft and under said bar.

7. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to cause the unwinding movement, a shaft, alever rotatably mounted on said shaft, a bar carried by said lever, aspring to urge said lever in one direction, abrake member, a pin andslot connection between said brake member and said lever, so that whenthe paper is trained over the shaft and under the bar and the paperfeeding mechanism is operated the lever will be raised so as to causethe brake member to be inopera tive and when there is a slack in thepaper the spring will cause the lever to be lowered and the brake memberto become efiectual.

8. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a disk associated with said roll andadapted to move therewith, a shaft around which said web is trained, anarm mounted on said shaft and having a braking surface adapted to engagesaid disk and to resist normally the unwinding movement of said roll,and means including a pin and slot connection to intermittently releasesaid brake.

9. In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a disk associated with said roll andadapted to move therewith, a shaft around which said web is trained, anarm mounted on said shaft and having a braking surface adapted to engagesaid disk and to resist normally the unwinding movement of said roll,means including a pin and slot connection to intermittently release saidbrake, and means whereby said means is controlled by said web.

1i). In combination with a roll of paper mounted for unwinding movementand a feeding mechanism to draw a web of paper from said roll and tocause the unwinding movement, a disk associated with said roll andadapted to move therewith, a shaft around which said web is trained, anarm mounted on said shaft and having a braking surface adapted to engagesaid disk and to resist normally the unwinding movement of said roll, alever to intermittently release said brake, and means whereby said leveris controlled by-said web.

GROVER C. COIL.

.Lilt.

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